Concentrator arrangement for wideband switching

ABSTRACT

A combined voiceband and wideband communication system is disclosed. Customer stations are coupled directly to a switching office for voiceband service and wideband service is furnished to the stations via a concentrator which is controlled by the switching office. Signals transmitted from the stations directly to the office control the selection of voiceband or wideband paths to the stations. Provisions are also made for intraconcentrator wideband calls.

United States Patent [151 3,701,849

Stapleton [4 1 Oct. 31, 1972 [54] CONCENTRATOR ARRANGEMENT 3,335,226 8/1967 Michael ..l79/l8 C FOR WIDEBAND SWITCHING OTHER PUBLICATIONS [72] Inventor: Richard Joseph Stapleton, Westerm Ohio Bell Laboratories Record, May/June 1969, pp. 155- 159 Korn, Ritchie, Choosing the Route. [73] Assignee: Bell Telephone Laboratories, Incorpomted Murray Primary Examiner- Kathleen H. Claffy [22] Filed: Feb, 9, 1970 Assistant Examiner-Thomas DAmico [21] p No 9 915 Attorney-R. J. Guenther and James Warren Falk ABSTRACT [52] U.S. Cl. ..179/2 TV, 179/18 PC A combined voiceband and wideband communication [51] Int. Cl. ..H04m 11/06, H04q 3/60 System is disclosed Customer stations are coupled [58] Field of Search "179/18 2 4 directly to a switching office for voiceband service and 56 R f d wideband service is furnished to the stations via a con- 1 e erences centrator which is controlled by the switching office. UNITED STATES PATENTS Signals transmitted from the stations directly to the office control the selection of voiceband or wideband 3573377 4/1971 Anderson "179/2 TV paths to the stations. Provisions are also made for insnderson traconcentrator wideband calls.

ee 3,226,484 12/1965 James ..l79/2 TV 6 Claims, 54 Drawing Figures WIDEBAND I f g E CENTRAL OFFICE Ioo r Iiiili REMOTE WIDEBANI.)

. LINE LINK WIDEBAND lfi i 31% L F klIiZ '43s n9 I07 i I25 l i l y I06 WIDEBAND LINE LINK CONNECTOR L E LINK FRAME LINE LINE SWITCHES gwa g J: J [l2] as; i an L I04TS LINE LINK CONNECTOR I22- I I /l38 WIDEBAND H LINE CONTROL F i REMOTE SWITCH SIGNAL CONTROL United States Patent [151 3,701,849

Stapleton 1 Oct. 31, 1972 CENTRAL OFFICE I00 WIDEBAND TRUNK LINK FRAME I34 WIDEBAND I I lNTRA-OFFICE l 1 5w5 TRUNK U WXDEBAND OUTGOING Nawa TRUNK WIDEBAND INCOMING H4WB TRUNK WIDEYBAND I37 TRUNK LINK-T ne- TRUNK CONNECTOR SWITCHES no I28\ TRUNKLTNKFR M l3! ,usA

L 2 INTRA-OFFICE J TRUNK I08A TRUNK 1184 lNTRA-OFFICE JUNCTOR T TRUNK i] SWITCHES b I T OUTGOIN TRUNK a 5 T v I INCOMING l TRUNK TRUNK LINK CONNECTOR ORIGINATING REGISTER I |4o I09 MARKER CONNECTOR 7 NUMBER GROUP PATENTED 0m 3 I I872 SHEET 01 0F 49 F/G IA WIDEBAND IOBWB I REMOTE I SWITCH UNIT CENTRAL OFFICE I00 IdIvs I WIRIETIIBRQND B REMOTE WIDEBAND l SWITCH I LINE LINK WIDEBAND TRUNK FRAME JUNCTOR IoI IOITS -I32 Ias 02vs fi J I J I N9 I07 I25 III Io2Ts J v I J I Ly I06 Du:

. WIDEBAND mvs LINE LINK CONNECTOR I26 I27 1% mm I ,H1E LINK FRAME sa i 1- I f |04VS UNE LINE SWITCHES g K L Q I2I m QED I o IO4TS LINE LINK CONNECTOR I38 WIDEBAND logy LINE CONTROL I ,-/I39 REMOTE SWITCH SIGNAL CONTROL M/l/ENTOR By R. J. STAPLE TON $4M 3/ 10M ATTORNEY PATENTED B I97? I 3.701. 849

SHEET DZUF 49 FIG. lB

CENTRAL OFFICE I00 WIDEBAND TRUNK LINK FRAME |34 WIDEBAND III 1 lNTRA-OFFICE l H20 |l5WB- TRUNK a L v WIDEBAND OUTGOING IIawB- TRUNK b L I WIDEBAND INCOMING H4WB TRUNK WIDEBAND 37 TRUNK LINK -I II6 CONNECTOR EF w IIol28 TRUNK LINK FRAME IaI /H5A lNTRA-OFFICE TRUNK i ,IIOBA TRUNK H8 lNTRA-OFFICE JUNCTOR TRUNK SWITCHES OUTGOING v TRUNK o I i m INCOMING TRUNK \MA TRUNK LINK CONNECTOR ORIGINATING REGISTER I40 v I09 MARKER CONNECTOR /ll7l NUMBER GROUP PATENTED E 3 1 SHEET 110F 19 u l I I d t5 5% 8 X23 X22: 8 x2: 22 -129 -129 -129 x H E H G S m E 6% 08 n T n v I mum 5Q e x H x F b Est i H x A f K2: m2: 8 1| E03 E5 1 mm? 25 LT H 2 525; if. mm a .2 m2: 1. 2: m2: 8 1| v2: NZ: 8 

1. A communication system comprising a central office switching network including voice terminals and wideband terminals; a wideband concentrator remotely located from said office and comprising a plurality of first terminals, a plurality of second terminals less in number than said first terminals, and means for interconnecting said first and second terminals; a plurality of communication circuits each coupled to a corresponding one of said voice terminals and one of said first terminals; wideband transmission links interconnecting said second terminals with said wideband terminals; a data link interconnecting said office and said concentrator and control means at said central office comprising means for establishing a voice transmission path over said network to a voice terminal associated with a designated one of said circuits, means for testing the busy-idle condition of said transmission links for selecting an idle one of said transmission links, first transmitting means for identifying said selected transmission link and for transmitting over said data link a first coded signal representing the second terminal of said transmission link, and second transmitting means for determining the first terminal of said designated circuit and for transmitting over said data link a second coded signal representing the first terminal of said designated circuit.
 2. The invention defined in claim 1 wherein said interconnecting means comprises a switching matrix having at least two sets of intersecting coordinates, one set being coupled to said first terminals and the other set being coupled to said second terminals, means responsive to said first coded signal for actuating a coordinate of said first set, and means actuated by said second signal for actuating a coordinate of said second set to interconnect the corresponding first and second terminals.
 3. The invention defined in claim 2 wherein said concentrator further comprises means effective when at least two second set coordinates are simultaneously actuated for blocking actuation of said establishing means.
 4. The invention defined in claim 2 wherein said concentrator also comprises means effective upon the actuation of one of said first set coordinates for transmitting a first verification signal to said central office control means and wherein said second transmitting means comprises means responsive to said first verification signal for transmitting said second coded signal.
 5. The invention defined in claim 4 wherein said concentrator further comprises means effective upon the actuation of one of said second set coordinates for transmitting a second verification signal to said central office control means and wherein said control means also comprises means responsive to said second signal for establishing said voice transmission path.
 6. In combination a central office switching network comprising a plurality of voice terminals, a plurality of wideband terminals, and switching means for establishing communication paths between said central office terminals; a wideband concentrator remotely located from said office and comprising a plurality of terminals, a plurality of links less in number than said terminals for coupling said concentrator to said central office, and switching means for establishing communication paths between said concentrator terminals and said links; a plurality of telephone stations and a plurality of audio trunks each coupled to a different one of said voice terminals; a video transceiver associateD with each of said stations, certain of said transceivers being coupled to first ones of said central office wideband terminals and others of said transceivers being coupled to said concentrator terminals; a plurality of wideband trunks each coupled to second ones of said central office wideband terminals; a plurality of intraconcentrator trunks coupled to said concentrator; means connecting a first group of said audio trunks with said wideband trunks; means connecting a second group of said audio trunks with said intraconcentrator trunks; translator means at said central office responsive to indicia representing the voice terminals of telephone stations designated for interconnection for determining the terminal locations of the video transceivers associated with said designated stations; and means controlled by said translator means for actuating the appropriate one of said switching means in accordance with the terminal locations of said designated transceivers; wherein said actuating means comprises means effective when at least one of said designated transceivers is coupled to said central office wideband terminal for selecting one of said first group trunks and means effective when all said designated transceivers are coupled to said concentrator terminals for selecting one of said second group trunks. 